OpenJDK 27 · sun.jvmstat.perfdata.monitor.PerfDataBufferImpl

Modifier and Type	Field and Description
protected Map<String, Monitor>	aliasCache A cache of resolved monitor aliases.
protected Map<String, ArrayList<String>>	aliasMap A Map of monitor object names to aliases as read in from the alias map file.
protected ByteBuffer	buffer The buffer containing the instrumentation data.
protected int	lvmid The Local Java Virtual Machine Identifier for this buffer.
protected Map<String, Monitor>	monitors A Map of monitor objects found in the instrumentation buffer.

Access	Constructor and Description
protected	PerfDataBufferImpl(ByteBuffer the ByteBuffer containing the instrumentation data. buffer, int the Local Java Virtual Machine Identifier for this instrumentation buffer. lvmid) Constructor.

Method Summary

Modifier and Type	Method and Description
private void	buildAliasMap() Build the alias mapping.
protected abstract void	buildMonitorMap(Map<String, Monitor> the map of Monitors. m) build the map of Monitor objects.
protected Monitor	findByAlias(String name) Find the Monitor object for the named counter by using one of its aliases.
public Monitor	Returns: Monitor - the `Monitor` object that can be used to monitor the named instrumentation object, or `null` if the named object doesn't exist. findByName(String the name of the Instrumentation object to find. name) Find a named Instrumentation object.
public List<Monitor>	Returns: `List<Monitor>` - a List of `Monitor` objects that can be used to monitor the instrumentation objects whose names match the given pattern. If no instrumentation objects have` names matching the given pattern, then an empty List is returned. findByPattern(String a string containing a pattern as described in `java.util.regex.Pattern`. patternString) Find all Instrumentation objects with names matching the given pattern.
pack-priv ByteBuffer	Returns: ByteBuffer - a ByteBuffer object that refers to the instrumentation data. getByteBuffer() Get the ByteBuffer containing the instrumentation data.
public byte[]	Returns: byte[] - a copy of the bytes in the instrumentation buffer. getBytes() Get a copy of the raw instrumentation data.
public int	Returns: int - the capacity, or size, of the instrumentation buffer. getCapacity() Get the capacity of the instrumentation buffer.
public int	Returns: int - the lvmid getLocalVmId() Get the Local Java Virtual Machine Identifier, or lvmid for the target JVM associated with this instrumentation buffer.
public MonitorStatus	Returns: MonitorStatus - the status of available Monitors for the target Java Virtual Machine. getMonitorStatus() Get a list of the inserted and removed monitors since last called.
protected abstract MonitorStatus	getMonitorStatus(Map<String, Monitor> the map of Monitors. m) get the list of inserted and removed monitors since last called.
protected abstract void	getNewMonitors(Map<String, Monitor> the map of Monitors. m) get the new Monitor objects from the Map of Monitor objects.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

aliasCache	back to summary
protected Map<String, Monitor> aliasCache A cache of resolved monitor aliases.

aliasMap	back to summary
protected Map<String, ArrayList<String>> aliasMap A Map of monitor object names to aliases as read in from the alias map file.

buffer	back to summary
protected ByteBuffer buffer The buffer containing the instrumentation data.

lvmid	back to summary
protected int lvmid The Local Java Virtual Machine Identifier for this buffer.

monitors	back to summary
protected Map<String, Monitor> monitors A Map of monitor objects found in the instrumentation buffer.

PerfDataBufferImpl	back to summary
protected PerfDataBufferImpl(ByteBuffer buffer, int lvmid) Constructor. Parameters buffer:ByteBuffer the ByteBuffer containing the instrumentation data. lvmid:int the Local Java Virtual Machine Identifier for this instrumentation buffer.

Method Detail

buildAliasMap	back to summary
private void buildAliasMap() Build the alias mapping. Uses the default alias map file unless the sun.jvmstat.perfdata.aliasmap file indicates some other file as the source. Annotations @SuppressWarnings:deprecation

buildAliasMap

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private void buildAliasMap()

Build the alias mapping. Uses the default alias map file unless the sun.jvmstat.perfdata.aliasmap file indicates some other file as the source.

Annotations

@SuppressWarnings:deprecation

buildMonitorMap	back to summary
protected abstract void buildMonitorMap(Map<String, Monitor> m) throws MonitorException build the map of Monitor objects. Parameters m:Map<String, Monitor> the map of Monitors. Exceptions MonitorException: Thrown if communications errors occur while communicating with the target.

buildMonitorMap

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protected abstract void buildMonitorMap(Map<String, Monitor> m) throws MonitorException

build the map of Monitor objects.

Parameters

m:Map<String, Monitor>: the map of Monitors.

Exceptions

MonitorException:: Thrown if communications errors occur while communicating with the target.

findByAlias	back to summary
protected Monitor findByAlias(String name) Find the Monitor object for the named counter by using one of its aliases.

findByName back to summary

findByName	back to summary
public Monitor findByName(String name) throws MonitorException Find a named Instrumentation object. This method will look for the named instrumentation object in the instrumentation exported by this Java Virtual Machine. If an instrumentation object with the given name exists, a Monitor interface to that object will be return. Otherwise, the method returns `null`. The method will map requests for instrumention objects using old names to their current names, if applicable. Parameters name:String the name of the Instrumentation object to find. Returns:Monitor Monitor - the `Monitor` object that can be used to monitor the named instrumentation object, or `null` if the named object doesn't exist. Exceptions MonitorException: Thrown if an error occurs while communicating with the target Java Virtual Machine.

public Monitor findByName(String name) throws MonitorException

Find a named Instrumentation object. This method will look for the named instrumentation object in the instrumentation exported by this Java Virtual Machine. If an instrumentation object with the given name exists, a Monitor interface to that object will be return. Otherwise, the method returns null. The method will map requests for instrumention objects using old names to their current names, if applicable.

Parameters

name:String: the name of the Instrumentation object to find.

Returns:Monitor

Monitor - the Monitor object that can be used to monitor the named instrumentation object, or null if the named object doesn't exist.

Exceptions

MonitorException:: Thrown if an error occurs while communicating with the target Java Virtual Machine.

findByPattern back to summary

findByPattern	back to summary
public List<Monitor> findByPattern(String patternString) throws MonitorException, PatternSyntaxException Find all Instrumentation objects with names matching the given pattern. This method returns a `List` of Monitor objects such that the name of each object matches the given pattern. Parameters patternString:String a string containing a pattern as described in `java.util.regex.Pattern`. Returns:List<Monitor> `List<Monitor>` - a List of `Monitor` objects that can be used to monitor the instrumentation objects whose names match the given pattern. If no instrumentation objects have` names matching the given pattern, then an empty List is returned. Exceptions MonitorException: Thrown if an error occurs while communicating with the target Java Virtual Machine. See Also `java.util.regex.Pattern`

public List<Monitor> findByPattern(String patternString) throws MonitorException, PatternSyntaxException

Find all Instrumentation objects with names matching the given pattern. This method returns a List of Monitor objects such that the name of each object matches the given pattern.

Parameters

patternString:String: a string containing a pattern as described in java.util.regex.Pattern.

Returns:List<Monitor>

List<Monitor> - a List of Monitor objects that can be used to monitor the instrumentation objects whose names match the given pattern. If no instrumentation objects have` names matching the given pattern, then an empty List is returned.

Exceptions

MonitorException:: Thrown if an error occurs while communicating with the target Java Virtual Machine.

See Also

java.util.regex.Pattern

getByteBuffer	back to summary
pack-priv ByteBuffer getByteBuffer() Get the ByteBuffer containing the instrumentation data. Returns:ByteBuffer ByteBuffer - a ByteBuffer object that refers to the instrumentation data.

getByteBuffer

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pack-priv ByteBuffer getByteBuffer()

Get the ByteBuffer containing the instrumentation data.

Returns:ByteBuffer: ByteBuffer - a ByteBuffer object that refers to the instrumentation data.

getBytes	back to summary
public byte[] getBytes() Get a copy of the raw instrumentation data. This method is used to get a copy of the current bytes in the instrumentation buffer. It is generally used for transporting those bytes over the network. Returns:byte[] byte[] - a copy of the bytes in the instrumentation buffer.

getBytes

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public byte[] getBytes()

Get a copy of the raw instrumentation data. This method is used to get a copy of the current bytes in the instrumentation buffer. It is generally used for transporting those bytes over the network.

Returns:byte[]: byte[] - a copy of the bytes in the instrumentation buffer.

getCapacity	back to summary
public int getCapacity() Get the capacity of the instrumentation buffer. Returns:int int - the capacity, or size, of the instrumentation buffer.

getCapacity

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public int getCapacity()

Get the capacity of the instrumentation buffer.

Returns:int: int - the capacity, or size, of the instrumentation buffer.

getLocalVmId	back to summary
public int getLocalVmId() Get the Local Java Virtual Machine Identifier, or lvmid for the target JVM associated with this instrumentation buffer. Returns:int int - the lvmid

getLocalVmId

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public int getLocalVmId()

Get the Local Java Virtual Machine Identifier, or lvmid for the target JVM associated with this instrumentation buffer.

Returns:int: int - the lvmid

getMonitorStatus	back to summary
public MonitorStatus getMonitorStatus() throws MonitorException Get a list of the inserted and removed monitors since last called. Returns:MonitorStatus MonitorStatus - the status of available Monitors for the target Java Virtual Machine. Exceptions MonitorException: Thrown if communications errors occur while communicating with the target.

getMonitorStatus

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public MonitorStatus getMonitorStatus() throws MonitorException

Get a list of the inserted and removed monitors since last called.

Returns:MonitorStatus

MonitorStatus - the status of available Monitors for the target Java Virtual Machine.

Exceptions

MonitorException:: Thrown if communications errors occur while communicating with the target.

getMonitorStatus	back to summary
protected abstract MonitorStatus getMonitorStatus(Map<String, Monitor> m) throws MonitorException get the list of inserted and removed monitors since last called. Parameters m:Map<String, Monitor> the map of Monitors. Exceptions MonitorException: Thrown if communications errors occur while communicating with the target.

getMonitorStatus

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protected abstract MonitorStatus getMonitorStatus(Map<String, Monitor> m) throws MonitorException

get the list of inserted and removed monitors since last called.

Parameters

m:Map<String, Monitor>: the map of Monitors.

Exceptions

MonitorException:: Thrown if communications errors occur while communicating with the target.

getNewMonitors	back to summary
protected abstract void getNewMonitors(Map<String, Monitor> m) throws MonitorException get the new Monitor objects from the Map of Monitor objects. Parameters m:Map<String, Monitor> the map of Monitors. Exceptions MonitorException: Thrown if communications errors occur while communicating with the target.

getNewMonitors

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protected abstract void getNewMonitors(Map<String, Monitor> m) throws MonitorException

get the new Monitor objects from the Map of Monitor objects.

Parameters

m:Map<String, Monitor>: the map of Monitors.

Exceptions

MonitorException:: Thrown if communications errors occur while communicating with the target.

public abstract Class PerfDataBufferImpl

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail